If no local power source is available, we recommend using an off-the-shelf solar-battery unit for off-grid operation.
WARNING! Always familiarise yourself with the specifications and user guides of these units before you attempt to use them with a Telraam sensor.
As an example, the Telraam S2 Outdoor unit is tested successfully with the Sunba Solar Panel Battery Kit (MBB12V-6038 V2). This consists of a 60 W monocrystalline solar panel and a 38 Ah Li-ion battery, and weighs 10 kg. Follow the manufacturer's instructions to install the solar kit, either through their video guide or quick setup guide. For the newest variant with a separate charge controller unit see this video guide. Full specifications can be found here.
The outdoor unit consumes approximately 2-3 W continuously. The solar-battery system offers a rated endurance of 5-7 days without solar charging.
Solar panel orientation
The optional photovoltaic panel should be installed facing South (or at least somewhere between SE and SW), at a location surrounded by the least amount of obstructions and shade sources. The optimal tilt angle depends on your geographical latitude (but in general it is an angle slightly less than your latitude).
Solar-battery kit setup
The solar-battery kit comes in multiple variants: some with LEDs and a power button, some without. The newest model comes with a separately mounted charge controller unit. If your kit includes a power button, press it to activate the battery and supply power to the Telraam S2 Outdoor unit.
WARNING! Only press the power button after all connectors are securely attached and the entire setup is fully assembled.
The kit includes two U-shaped bolts (12 cm) and two pole mounts (Ø102-156 mm | type HT4) for flexible installation. Trim away any excess tie-wrap ends and ensure all cables are securely fastened with no loose connections.
The LEDs next to the power button, under the three cable connection points (or on the newest model on the side of the separate charge controller unit) provide information about the battery level (3 LEDs closest to the power button, with 3 lit LEDs indicating full charge, and 0 lit indicating a discharged state) and an active charging (when the outermost led is blinking yellow).
